[Bug d/96154] d: Add -Wvarargs warning flag to compiler

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96154

--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Iain Buclaw <ibuc...@gcc.gnu.org>:

https://gcc.gnu.org/g:873b45d39c14fee6b68032b83ea6bfbc023e3379

commit r11-2442-g873b45d39c14fee6b68032b83ea6bfbc023e3379
Author: Iain Buclaw <ibuc...@gdcproject.org>
Date:   Thu Jul 16 18:56:18 2020 +0200

    d: Add -Wvarargs warning flag to the D front-end

    The D front-end has C-style variadic functions and va_start/va_arg, so
    it is right to also have warnings for inproper use.

    gcc/d/ChangeLog:

            PR d/96154
            * gdc.texi (Warnings): Document -Wvarargs.
            * lang.opt: Add -Wvarargs

    gcc/testsuite/ChangeLog:

            PR d/96154
            * gdc.dg/pr96154a.d: New test.
            * gdc.dg/pr96154b.d: New test.